How to remove the last item from php array

3 ways to remove: 1. Use array_pop() to delete the last element, the syntax is "array_pop(array);". 2. To use array_splice(), just set the second parameter of the function to "-1", the syntax is "array_splice(array,-1)". 3. To use array_slice(), just set the second parameter of the function to 0 and the third parameter to "-1", the syntax is "array_slice(array,0,-1)".

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

Remove the last part of the php array Three methods for an element:

Method 1: Use the array_pop() function to delete the last element

array_pop() function to delete the array the last element in .

array_pop($array)

This function will change the original array; the return value is the last value of the array. If the array is empty or not an array, NULL will be returned.

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);  
$arr = array(1,2,3,4,5,6,7,8,9,10);
echo "原数组：";
var_dump($arr);

array_pop($arr);
echo "移除最后一项后：";
var_dump($arr);
?>

Method 2. Use array_splice() function to delete the last element

array_splice() function deletes part of the elements of the array When , these deleted elements will be formed into a new array, and then the new array will be returned; therefore, the array_splice() function can be used to intercept array fragments.

array_splice(array1,start,length,array2)

Parameters	Description
array1	Required . Specifies an array.
start	Required. numerical value. Specifies the starting position of deleted elements. 0 = first element. If the value is set to a positive number, removal begins at the offset specified by the value in the array. If the value is set to a negative number, removal begins at the offset specified by the value from the end of the array. -2 means start from the second to last element of the array.
length	Optional. numerical value. Specifies the number of elements to be removed, which is also the length of the returned array. If this value is set to a positive number, remove this number of elements. If this value is set to a negative number, all elements from start to length inverse of the end of the array are removed. If this value is not set, all elements from the position set by the start parameter to the end of the array are removed.
array2	Optional. Specifies the array with the elements to be inserted into the original array. If there is only one element, it can be set to a string and does not need to be set to an array.

#This function will change the original array and return the array containing the extracted elements.

Just set the second parameter start of the function to -1 to delete the last element

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(1,2,3,4,5,6,7,8,9,10);
echo "原数组：";
var_dump($arr); 

echo "移除最后一项后：";
$result = array_splice($arr,-1); 
var_dump($arr);
echo "被删除的数组元素：";
var_dump($result);
?>

Method 3. Use The array_slice() function deletes the last element

The array_slice() function is a function provided by PHP to intercept an array. It can extract a fragment from the array. The syntax is as follows:

array array_slice ( array $arr , int $start [, int $length = NULL [, bool $preserve_keys = false ]] )

Parameter description:

• arr represents the array to be intercepted.
• start indicates the starting position (subscript) of interception:
  • If start is a positive number, interception will be performed from front to back.
  • If start is a negative number, start from the position -start from the end of arr and intercept from back to front. For example -2 means start from the second to last element of the array.
• length is an optional parameter, indicating the intercepted length:
  • If length is a positive number, it indicates the number of intercepted elements;
  • If length If it is a negative number, then the intercepted fragment will end at the length position from the end of the array;
  • If it is omitted, it will start from the start position and continue to the end of the array.
• preserve_keys is an optional parameter that specifies whether to retain the original key name. The default is false, that is, not retained; if set to true, the original key name will be retained.

Return value: Returns the selected part in the array.

Just set the second parameter to 0 and the third parameter to -1.

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(2,4,6,8,10);
echo "原数组：";
var_dump($arr); 

echo "移除最后一项后：";
$result = array_slice($arr,0,-1); 
var_dump($result);
?>

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